Perhaps you should try some spelling variations:
thieu sach » chieu sach, hieu cach, theo sach
thien hach » thien thanh, hien hanh
thanh tung » thanh cong
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
manh toan » thanh toan, tinh toan
tung cua » trung cua, tuong cua, dung cua

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sach) OR (thien hach)) - thanh tung cua nhung cong ((manh toan) or (anh tuan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sach) OR (thien hach)) - thanh tung cua nhung cong ((manh toan) OR (anh tuan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sach) OR (thien hach)) - thanh tung cua nhung cong ((manh toan) or (anh tuan)) tap".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sach) OR (thien hach)) - thanh tung cua nhung cong ((manh toan) or (anh tuan)) tap*.